Lochlan O'Brien

Lochlan O'Brien was a Sinn Fein TD. O'Brien was an opponent of the 1921 Anglo-Irish Treaty and a supporter of the nationalist leader Eamon de Valera, and he was one of the deputies who walked out of a Dail Eireann session to protest the ratification of the treaty. O'Brien would later join the Fianna Fail party due to his support for De Valera.